Air conditioning apparatus



Oct. 4, 1938. A. s. LOCKE 2,132,372

AIR CONDITIONING APPARATUS Filed April 27, 1934v 5 Sheets-Sheet 1 l Fulmummunmll@ #i @Hummm mnlwmm-- hummm mmm@ Oct. 4, 1938.

A. s. LoKE AIR CONDITIONING APPARATUS Filed April'27, 1954 5 Sheets-Sheet 2 INV ENTOR A 5. Oc/fe Oct. 4, 1938. A. s. LocKE 2,132,372

AIR CONDITIONING APPARATUS Filed April 27, 19254 5 Sheets-Sheet 3 INVENTOR 5. LOC/fe Oct. 4, 1938. A. s. LocKr:

AIR CNDITIONING APPARATUS Filed April 27, 1954 5 Sheets-Shes?l 4 INVENTOR ASoc/fe B A TORNEY Oct. 4, 1938. l A. s, LQCkE 2,132,372

AIR CONDITIONING APPARATUS Filed April 27, 1934 5 Sheets-Sheet 5 Patented Oct. 4, 1938 UNITED STATES PATENT OFFICE AIB CONDITIONING APPARATUS of Delaware Application April 27, 1934, Serial N0. 722,714

15 Claims.

This invention relates generally to self-contained air conditioning units for homes, oiiices or other enclosures, and more particularly to an improved combination and construction of refrigerating elements such as a compressor, condenser and evaporator, and means for circulating outside air over the condenser for cooling the same and for circulating room air over the evaporator.

A great many combinations havey heretofore been proposed for air conditioning apparatus of the type especially adapted to be located in a room to be cooled, but such combinations have either required a relatively large amount of space for a given cooling capacity or have been comparatively expensive in manufacture. It is desirable to have a unit of relatively large air cooling capacity consistent with minimum space requirements, to have a unit that is economical in manufacture both as to its component parts and their assembly, that is efficient in operation, and that is adapted to be easily installed and readily enclosed within a cabinet of attractive appearance.

It is one object of my invention to provide an improved self-contained air conditioning unit wherein the compressor, condenser and evaporator are so cooperatively arranged as to require minimum space consistent with efficient operation and economical manufacture of the component parts and their assembly.

A further and more specific object is to accomplish the foregoing desirable results by providing three parallel vertical compartments disposed side by side whereby outside air ows into one of said compartments and out through another in a rela,- tively simple path while the room air is circulated in a substantially straight path from the blower over the evaporator. A

Another object is to provide an improved combination of compartments so arranged that the compressor, condenser and condenser air circulating means may be totally enclosed in two adjacent compartments by a soundproof housing without in any Way requiring excessive space or of restricting in any way the eiilciency of air flow over the compressor and condenser. Another object in this respect is to have the evaporator disposed in a third compartment in a substantially exposed condition, but so constructed that a fan motor may effectively circulate room air over the evaporator.

A further object is to provide improved condenser and evaporator units that are relatively elongated in the direction of air ow thereovei whereby the air passes over these complementary heat exchange elements at a relatively high velocity thereby increasing not only the heat transfer between the elements and air but also creating a more positive air motion or circulation within 5 a room so as to insure uniform cooling thereof.

A more specific object of the invention is to provide improved self-supporting and self-ductforming condenser and evaporator units, this being specifically accomplished by having their walls elongated or suitably extended to form standards or supporting end plates adapted to rest directly upon a base thereby eliminating the necessity of any supporting frames while at the same time permitting the end plates to define air passage walls.

A still further object is to provide condenser and evaporator units whereby their end walls function not only as supporting standards but also perform the `additional function of forming part of the fan housing. It will of course be understood that the condenser and evaporator may have their functions interchanged to permit the unit to operate as a heater instead of a cooler, this mode of operation and the necessary reversing mechanism being well known.

Another object is to provide an improved arrangement of compressorand fan motor to insure not only minimum space requirements but also minimum noise in the room together with efficient air cooling of the compressor and fan motor by the iiow of the outside air through the unit.

Other objects relate to improved means for stream-lining the condenser or evaporator tubes, to an improved manner of having the return bends of the condenser or evaporator tubes extend through the supporting end sheets, and to provide an improved pumping means for disposing of condensate with a relatively simple but novel driving mechanism between the fan and pump, this driving mechanism preferably employing an oscillating device such as is normally used for desk fans.

Other objects and advantages will be more apparent to those skilled in the art from the following description of the accompanying drawings in which:

Fig. l is a vertical sectional view of my improved unit: 5o

Fig. 2 is a plan view of Fig. 1 with the top thereof removed;A

Fig. 3 is a perspective of one of the heat exchange elements, namely, the evaporator, showing the manner in which it is self-contained both as to its mode of support and as functioning to guide the air flow therethrough;

Fig. 4 is a perspective similar to Fig. 3 but showing the condenser together with its self-contained supporting and air passage features and showing especially the manner in which the fan scroll is associated with the supporting extension of the end plates, this latter feature also being applicable to an evaporator in case a similar type of fan is employed therewith;

Fig. 5 is an enlarged sectional view of a pump particularly adapted to be driven by the air circulating motor disposed either on a horizontal or vertical axis;

Fig. 6 is a fragmentary vertical sectional view with a modified arrangement of fans for the room air and outside air;

Fig. 'I is a perspective of one form of my improved condenser embodying improved streamlining for the refrigerant tubes and embodying improved means for turning the air flow through 90 to discharge the same outwardly, these features providing not only less resistance to the air flow but also increasing the heat transfer between the tubes and fins. The stream-lining feature is also employed in the evaporator, the air turning means being omitted in this case.

Fig. 8 is an enlarged perspective of a portion of a n with one form of stream-lining for the tubes;

Fig. 9 is a sectional plan view showing a series of fins and the manner in which the stream-line flanges of one fin cooperate with the adjacent fin to provide a uniform stream-line effect throughout the length of each tube, this section being substantially on the line 9--9 of Fig. 8;

Fig. 10 is a perspective of a preferred form of tube, this having a stream-lined shape so as to obtainvarious advantages in addition to less resistance to the air flow;

Fig. 11 is an enlarged fragmentary perspective of condenser fins showing air-turning baiiles thereof;

Fig. 12 is a perspective of the upper portion of the adjacent sides of the condenser and evaporator showing a modified arrangement for heat and sound insulating the condenser chamber;

Fig. 13 is a diagrammatic elevational view of a modified condensate disposal means utilizing an ejector communicating with the base sump and actuated by air supplied directly from the fan casing or passage;

Fig. 14 is a sectional view of a modified tube of elliptical formation.

In the illustrated embodiments of my invention which are shown herein merely for the purpose of disclosing certain specific forms among possible others that the invention might take, I have provided a suitable and preferably pressed sheet metal base I having a sump-portion 2 and marginal flanges 3. A motor-compressor unit generally indicated at 4 is preferably, but not necessarily, of the vertical axis hermetically sealed piston and cylinder type. This compressor unit and a fan motor 5 are disposed in superimposed relation preferably with the motorcompressor unit supported above the fan motor as by any suitable brackets 6 extending up from base I.

A pair of complementary heat exchange elements such as a condenser 9 and evaporator III are vertically disposed in sidewise alignment with the end compartment in which the motor-compressor is disposed.

In order to obtain the utmost in simplicity of arrangement together with economical manufacture while at the same time maintaining the proper passage walls by which outside air flows into one compartment and out through another separately from the flow of room air through the wardly at I3 and I4, as either integral or separately secured pieces, to be supported on base I. Supported between the extensions I3 and I3 is preferably a fan scroll I5, the edges of this scroll being welded or otherwise suitably secured to the inner faces of said extensions. As a result, the

extensions are not only reinforced by the fan scroll but also function as part of the fan casing. A circular inlet I6 is formed in the extension I3 while a fan rotor Il is directly secured to the armature shaft of fan motor 5. 'Ihe end sheets II and II preferably have a small flange I8 and I 8 extending for the full length thereof to strengthen the sheets.

As a result of the simplicity of the heat exchange element as above described, it is only necessary in assembling a unit to place the heat exchange element on base I and suitably secure the same thereto as by welding or bolting. There is no need of forming separate ducts, walls, partitions or the like because the same are inherently formed merely by the positioning of the element,

- in this case the condenser.

'I'he compressor and condenser are entirely enclosed by a suitable enclosure generally indicated at I9 having four sides and a top. The two end sides I9a, IBb, front side I9c and top IBd are entirely solid while the rear side I9e has an inlet opening I9g and an outlet opening I9h. The outlet I9h is in alignment with the condenser 9 so that the end wall I I thereof forms a natural partition between the inlet and outlets |99 and I 9h. 'I'hese inlets and outlets are directly connected through a suitable duct with a suitable opening thereby to permit outside air to be drawn inwardly through opening |99 and downwardly over motor-compressor unit 4 and motor 5 and thence inwardly through inlet I6 and upwardly over condenser 4 to be discharged to the outside through opening I9h.

'Ihe evaporator I0, shown particularly in Figs. l and 3, is constructed similarly to condenser I in that end walls or sheets 20 and 20' have extensions 22 and 23 secured to base I. A fan scroll 24 is disposed between and supported in a manner similar to scroll I5 by one or both of the end sheets 20 and 20 depending upon the axial length of the scroll as determined by the fan capacity. A room air fan rotor 25 is mounted on a common shaft with rotor I1 for rotation by motor 5, the end of the shaft being journalled in a bearing bracket 26 secured to base I. Room air flows inwardly preferably beneath the lower edge 21 disposed at the end, front and back of a suitable cabinet C loosely set Vover the unit, thence flows inwardly through preferably opposed inlet openings 28 formed in the extensions 22 and 23, although if desired only one of either of said inlets may be used. The air is propelled by blower 25 upwardly over evaporator III and thence discharged verticallyinto the room through a cabinet opening C'. Itis thus seen that this arrangement results in an extremely simple path to receive the expansion means.

of room air flow, as indicated by arrow 29, -it being noted that from the fan to the point of discharge into the room avertical straight ow is created. Hence a high degree of efficiency results in the flow conditions in addition to a simple but effective structure. Suitable vertical sheet metal plates 29a and 29h (Fig. 2) secured to flanges 2| and 2|', provide the necessary front and back walls for completing the -vertical air passage through the evaporator and milarlyfor the condenser if so desired. l

'I'he evaporator is spaced from the; condenser by a distance equal to the thickness 'of lthesound enclosure. It is by such a simple relation of parts that the enclosure forms not only a very effective sound enclosure .means but also completes the remaining passage walls for the condenser and compressor compartments.

To discharge water that condenses on'evaporator I0 during flow of room air thereover,l I have provided a reciprocating piston type pump generally indicated at 30 driven from the end of the armature shaft of motor 5 through a set ofsuitable worm reduction gears diagrammatically indicated at 3|. A crankpin 32 is suitably connected to the outer end of wormvgear shaft 33 and reciprocates a plunger 34 in aicylinder 35. The pump cylinder is shown indetail in. Fig. 5 in connection with another modification. The cylinder is located in the base sump! end is supported for oscillationas Aat 36L A suitable inlet check valve 31 and outlet check valve 38 permit condensate accumulated, in sump' 2 to be drawn into the pump cylinder 35 anddischarged through a pipe 39 into the path of outside room air preferably by being discharged through jet openings (Fig. 1) in a pipe 40 over the top of condenser 9, and also over the top of evaporator I0 if desired.

Again referring to Fig. 1, suitable refrigerant expansion means are diagrammatically indicated at 42 connected as by pipes 43 and 44 to the heat exchange elements 9 and I0. As it is desired to maintain the expansion means 42 in a cool zone and also to provide ample space for its location, it is disposed wholly or partly Within the evaporator compartment I0, although as shown in Fig. 1 an opening 44a is provided in the enclosure wall If desired, this opening may be suitably closed around one side of the-expansion means or this opening, if left open, may be used to admit to the flow of room air, fresh outside air through an opening 44h formed in the condenser end sheet at any suitable point such as adjacent fan |1 or higher if desired.

As a result of my improved arrangement, it is seen that the motor-compressor unit and fan motor are disposed in one vertical compartment generally indicated at 45, the condenser 9 and fan I1 arev disposed in the second vertical compartment 46 while the evaporator I0 and fan 25 are disposed in the third vertical compartment 41. It is also seen that the return bends 48 of the condenser and evaporator are disposed outside of the condenser and evaporator end sheets. This permits, in connection with the condenser, additional pipe area to be located directly within the path of outside air, as the return bends project into the compressor compartment and are therefore subject to the air flow therethrough. This result is accomplished even though a curved or fiat air filter of suitable construction is vertically disposed to the side of the condenser and in front of the blower inlet I6 as dia- .Fig. 1.

grammatically indicated by dotted lines 40. Figs. 1 and 2. The arrangement of the compressor and condenser compartments is particularly adapted for the location oi a filter as described.

In the modification shown in Fig. 6, the room air fan 60 is shown as of the vertical axis propeller type suitably supported by the evaporator end sheets through brackets 5|. Room air flows inwardly beneath the cabinet edges as previously described and thence inwardly between the evaporator end sheets at their lowermost portion and also, if desired, inwardly through an opening 52 formed in the end sheet. The outside air fan 53 for the condenser is separately driven by a motor 54 located in the compressor compartment. The fan scroll construction is the same as previously described. 'I'he pump 30 and operating mechanism therefor are the same as previously described for the preferred modification, the pump however, being turned in the respective modications to suit either the vertical or horizontal axis motors.

In Figs. '7, 8 and 10 I have provided improved means for directing the air ow over the condenser and evaporator tubes and of turning the vertical ow of condenser air at right angles to discharge the same through lateral outlet |971, I have provided improved stream-lined tubes, this being effected for tubes of circular cross-section, Fig. 8, by bending in narrow flanges 6| and 6|' in the form of a triangle immediately above the circular tube openings or collar flanges .66. Fianges 6| and 6|' will terminate just short of the circular pipe 62 so that a portion of the air may circulate around the upper half of the pipe while the main body of air is efllciently guidedgby the stream-line flanges 6| and 6| Without causing excessive eddy currents and otherwiseretarding the flow. These stream-line flanges are formed in each pipe iin 64 for cooperation With each of the pipe openings therein, whereby when these fins are successively positioned against each other as shown in Fig. 9, the stream-line flanges 6| and 6|' will engage the opposed face of the adjacent iin in alignment with the stream-line flanges 6| and 6I' on the other side of said adjacent n. Hence the complete assembly of fins over the pipes will result in a uniform stream-lining eiect for the full length of the pipes.

In the case of the evaporator I0, these streamlining flanges will extend vertically throughout the length of the evaporator whereas with the condenser I0 the stream-line flanges near the top will be increasingly turned toward the horizontal as diagrammatically shown in principle in Fig. '1, thereby to gradually and positively turn the high velocity air flow through a right angle with minimum eddy currents and loss of efllciency. The passage leading from outlet opening |9h is preferably curved at the corner 61 and gradually increases in cross-sectional area preferably by a downwardly sloping bottom wall 69, the other walls remaining horizontal or sloping outwardly.

In the form of refrigerant tubes shown in Fig. l0, I am able to accomplish not only streamlined tubes but also an actual increase of heat transfer tube area together with the further desirable feature of increasing the surface contact between the tube and the heat radiating fin. As shown in Fig. 10, the portion 10 of the tube extending through the series of ns 1| has either an elliptical or tapered formation to provide an inherently stream-lined tube. The direction of air ow is of course upward. This tube may be rolled to a preferably tapered form from an initially round piece of tube or it may be otherwise originally formed as a tapered tube. However, to construct a condenser or evaporator employing my improved tube, I provide a series of fins 1| similar to the fins for the other forms of condensers, and each finis provided with openings to receive a tube. Each of the openings is preferably provided with a flange 12 for contacting with the surface of the tapered tube 10. The edge of this flange abuts against the adjacent n to serve as a spacer and also to perform the additional desirable function of reinforcing the relatively straight tapered sides of the tube, thereby preventing a relatively high pressure, of say 200 pounds or thereabouts, bulging the tube out of shape. However, due to the straight sides, the high pressure will tend to force the sides of the tube into more intimate contact with the flanges 12, and it is preferable that after the fins and tubes, together with their return bends, are entirely assembled and ready to be dipped for galvanizing or other similar operation, they should be so dipped while the tubes are under pressure, thereby insuring permanent retention of the close huid-pressed contact between the tube and flange 12. As is seen from Figs. 3 and 4, the usual return bends 48 lie in an inclined plane so as to give a staggered effect between the tubes. To accomplish this staggered effect in a simple and yet effective manner, while at the same time insuring that the tapered tube will extend vertically as indicated at 14 in Fig. '7 and will extend in the direction of outfiow such as at 15, I form the return bends 48 so they have a circular cross-section, thereby permitting the bend to be bent in an inclined direction without imposing any undue stress on the tapered tube when lying in the vertical direction. This combination of tapered tubes with return bends of circular crosssection may be most effectively obtained by first taking a straight piece of circular tubing, then rolling the tube to a tapered formation starting near the center of the length of the tube thereby leaving a short portion of the tube at its middle of circular section. The tube will then be bent into a U shape with the circular cross-section forming the return bend 48. This U shape tube will then as is customary with this type of heat exchange element be inserted through two groups of aligned openings in the fins. After all of the U shape tubes have been inserted through the fins, the free ends of the tapered tubes will now be preferably reformed to a cylindrical cross-section for a short distance from their ends. This will permit return bends of cylindrical cross-section such as diagrammatically indicated in Fig. 1 at 11 to be easily soldered or otherwise hermetically secured to the tubes so as to effect a series connection thereof as shown in Fig. 1.

While tapered tubes of the foregoing type will insure minimum resistance to the air iiow over the heat exchange elements, yet in connection with the condenser I provide improved means for obtaining still greater eiciency of flow and to this end it will be noted in Fig. 7 that a series of bailles 18 are formed on the surface of the fin. These bafiles preferably are of the same radius and due to the vertical distance of outlet |871. being less than the depth of the condenser, the baffles 18 will form passageways which contract toward the downstream end of the bafes, thereby obtaining more efficient turning of the flow than if the baille passages were merely of uniform cross-sectional area or of increasing cross-sectional area as the discharge end is appreached. To form the bailles in a moet simple and yet effective manner, it will be noted from Fig. 11 that the baille for each fin 1| is formed by cutting the originally fiat iin along arcuate lines such as 18 and then pressing the baiiies 18 outwardly at right angles to the face of the un. Each fin is formed with such a set of baiiies so that when they are placed together the baiiies of the successive fins will not only be in alignment as shown in Fig. 11 but will also contact with the adjacent face of the next successive n, thereby providing a continuous baille throughout the width of the condenser. The open spaces formed adjacent the bames due to being cut along lines 18 will not affect the flow as the pressure in the various n passages is equal.

In the modification shown in Fig. 12 I have provided outwardly extending end anges and 8| for the condenser and evaporator respectively whereby these flanges may be placed against each other, thereby providing a chamber 82 in which the return bends and headers 83 and 8l, if desired, are disposed. The chamber 82v is then filled with suitable sound and heat insulating material 84 preferably in powdered form. This arrangement results in additional compactness of the unit due to eliminating the enclosure member |82; of Fig. 1.

In the modification of Fig. 13 I have provided an improved condensate disposal means comprising a vertical pipe 81 having a Venturi throat 88 which is supplied with air from any suitable point of the condenser air passage, such a point being diagrammatically shown by a pipe 88 extending into the discharge of the fan casing I8. If it is desired to increase the flow through pipe 89, a small deector may be formed on the inside of the scroll i5 adjacent the pipe inlet 88. An ejector tube 98 projects preferably vertically into cooperating relation with evaporator passage 88. 'I'he lower end of ejector tube 98 has preferably a bell mouth disposed slightly above the bottom of base sump 2. Any condensate which collects in the sump will be drawn in by the action of the ejector and carried directly upwardly through pipe 81 to a horizontal discharge pipe 8| overlying the top of the condenser. Suitable ports in this pipe may direct the water downwardly over the condenser to assist in cooling the same or the ports may direct the water horizontally in the direction of outfiowing air. Also if desired, the horizontal pipe may extend through the condenser ns near the center thereof so that a greater portion of the condenser tubes and fins will have a wetted surface. If it is desired to augment the upward flow of condensate through p-ipe 81, one or more booster ejectors 82 may be disposed within pipe 81. 'Ihese booster ejectors may be supplied with air through a pipe such as 93 connected into the condenser passage preferably just above the fan. In each case where either the pump or ejector arrangement has been shown in cooperation with the base sump 2, it will be understood that moisture which condenses on evaporator I8 will drip down into the fan scroll 24 and thence through suitable openings, Fig. 1, 94 therein to flow into the base sump. The water therein may readily flow to the pump or ejector by the provision of suitable small openings such as in the partition |8b or similar holes in any other walls that might obstruct the flow of water to the pump. As shown in Fig. i, the condensate discharge pipe 40 and likewise for the pipe 9| of Fig. 14 may extend over the evaporator I0 as well as over the condenser 0. thereby allowing condensate to be pumped over each of these elements to maintain a uniform wetted surface of each but with the assurance that condensate will be efficiently disposed of due to the fact that some of the condensate discharged over the condenser will be carried to the outside atmosphere in the air flow.

From the foregoing disclosure of the various modifications, it is believed that their operation is apparent but briefly the compressor unit 4, condenser 9 and evaporator I Il are connected to form a suitable compressor-condenser-evaporator circuit and the condenser is cooled by outside air flowing inwardly through a suitable Window opening, thence through opening I9g in the back panel I9e and thence downwardly along the iiow line 99 into inlet I6 to be propelled upwardly over condenser 9 by blower I1 and discharged to the outside through opening I9h. These various elements are entirely disposed within two vertical compartments disposed side by side and totally enclosed within enclosure I9. The room air is circulated upwardly by fan 25 which draws air in through or under a suitable cabinet enclosing the complete unit, the air thence flowing inwardly through inlets 28 and over evaporator I0 to cool the room air after which it is discharged vertically and with considerable velocity into the room. Condensate from the evaporator I0 accumulates in sump 2 and is discharged by pump 30 through pipe 39 from which it flows through horizontal pipe 40 either directly into the outgoing flow of air or over the condenser to assist in cooling the same. The unit may be used for a heater as well as a cooler. Assuming that heat exchange element I0 is operating as an evaporator (cooler operation), the condensate discharged thereon from pipe 40 would merely ilow down over the iin surfaces of the evaporator and accumulate in sump 2 to be discharged upwardly again over both the condenser and evaporator. Due to the fact that the condensate which flows over the condenser would be carried to the out--v air. In this way the condensate will nally bel disposed of on the condenser side even though a portion of the condensate is discharged over the heat exchange element now functioning as the evaporator.

It is also seen from the foregoing disclosure that an extremely simple and eiective means is provided for supporting the condenser and evaporator, for forming the air passages and compartment walls simply by assembling the condenser and evaporator units on base I whereupon these various features are automatically created, for effectively housing the compressor and condenser, and for efliciently obtaining maximum heat transfer area of the refrigerant tubes and insuring minimum resistance to the air ow thereover.

It will ofcourse be understood that various changes in detalls of construction and arrangement of parts may be made by those skilled in the art without departing from the spirit of the invention as set forth in the appended claims.

I claim:

l. An air conditioning unit comprising, in combination, a base, means forming three parallel vertical compartments extending upwardly from said base, a refrigerating system having operatively connected compressor, condenser and evaporator elements disposed respectively in said compartments, air circulating means communicating with said condenser and evaporator compartments for circulating outside air and room air respectively therethrough, and means whereby outside air flows in opposite directions over said compressor and condenser, the air circulating means including a motor supported by said base beneath said compressor and a fan driven by said motor disposed .in the lowermost portion of said. condenser compartment for discharging air vertically,

2. An air conditioning unit comprising, in combination, a casing having a substantially flat base, partition means cooperating with said casing to divide the interior thereof into parallel compartments extending from the base to the top of the casing, an evaporator in one of said compartments, refrigerant liquefying mechanism connected to said evaporator and comprising a motor, a compressor and a condenser arranged in the remainder of said compartments, an outside air inlet and outlet disposed at the upper portion of said casing in substantially adjacent relation to each other for conducting outside condenser cooling air into the unit, said partition means forming a passage connecting said inlet and said outlet to bring the outside air into heat absorbing relation with said condenser, a blower disposed in said condenser compartment for circulating said outside air inwardly of said inlet and over said condenser and outwardly through said outlet, and a blower in said compartment which contains the evaporator for circulating room air thereover.

3. An air conditioning unit comprising, in combination, a casing having a substantially at base, partitiom means cooperating with said casing to divide the interior thereof into a plurality of compartments one of which extends vertically substantially from said base to the top of the casing at one end of the unit and another of which is located at the other end of the unit, an evaporator in said latter compartment, refrigerant liquefying mechanism connected to said evaporator and comprising a motor, a compressor and a condenser arranged in the remainder of said compartments, an outside air inlet and outlet disposed at the upper portion of said casing in substantially adjacent relation to each other, said partition means forming a vertically extending passage located intermediate of said end compartments and extending substantially from the base to the top of the casing for connecting said inlet and said outlet to bring the outside air into heat absorbing relation with said condenser, a blower disposed in said condenser compartment for circulating outside air inwardly of said inlet and through said intermediate vertical passage to said outlet, and a blower in said evaporator compartment for circulating room air thereover.

4. An air conditioning unit comprising, in combination, a base, means forming three parallel vertical compartments extending upwardly from said base, a refrigerating system having operatively connected compressor, condenser and evaporator elements disposed respectively in said compartments, air circulating means communicating with said condenser and evaporator compartments for circulating outside air and room air respectively therethrough including a blower disposed inthe lowermost portion of said evaporator compartment for circulating room air vertically over the evaporator therein, and means whereby outside air flows in opposite directions over said compressor and condenser. y

5. An air conditioning unit comprising, in combination, a base, means 'forming three parallel vertical compartments extending upwardly from said base, a refrigerating system having operatively connected compressor, condenser and evaporator elements disposed respectively in said compartments, air circulating means communicating with said condenser and evaporator compartments for circulating outside air and room air respectively therethrough, means whereby outside air flows in opposite directions over said compressor and condenser, and means cooperating with the walls forming said compressor and condenser compartments for totally enclosing the compressor and condenser therein while said evaporator compartment is outside of said enclosure.

6. An air conditioning unit comprising, in combination, a base having a sump, operatively connected condenser and evaporator elements disposed over said base to discharge into said sump water condensed on the evaporator surface, means for circulating room air over one of said elements and means for circulating outside air over the other element, and condensate disposal means including an air operated ejector disposed adjacent to said sump and means for conducting ejected water into the path of outside air.

7. A self-contained air conditioning unit for installation in a room adjacent a window or other suitable wall opening comprising, in combination, a compressor and motor therefor disposed at one end of the unit, an evaporator disposed at the other end of the unit, means for circulating room air over said evaporator, a condenser, and means for circulating outside air over said condenser including a blower located at an intermediate portion of said unit near the bottom thereof and walls forming a passage for outside air extending upwardly from said blower and disposed to one side of said motor and compressor.

8. A self-contained air conditioningl unit for installation in a room adjacent a window or other suitable wall opening comprising, in combination, a compressor and motor therefor disposed at one end of the unit, an evaporator disposed at the other end of the unit, means for circulating room air over said evaporator, a condenser, and means for circulating outside air over said condenser including a blower located at an intermediate portion of said unit near the bottom thereof and Walls forming a passage for outside air extending upwardly from said blower and disposed to one side of said motor and compressor, said unit having a lateral opening in its back side near the top portion thereof for allowing communication between said vertical passage and the outside air through said window or wall opening.

9. An air conditioning unit comprising, in combination, a base, means forming three parallel vertical compartments extending upwardly from said base, a refrigerating system having operatively connected compressor, condenser and evaporator elements disposed respectively in said compartments, air circulating means communicating with said condenser and evaporator compartments for circulating outside air and room air respectively therethrough, means whereby outside air flows in opposite directions over said compressor and condenser, and a propeller type fan for circulating/room air vertically over said evaporator. i'

10. An air conditioning unit comprising, in combination, a base, means forming three parallel vertical compartments extending upwardly from said base, a refrigerating system having operatively connected compressor, condenser and evaporator elements disposed respectively in said compartments, air circulating means communicating with said condenser and` evaporator compartments for circulating outside air and room air respectively therethrough, means ,whereby outside air flows in opposite directions over said compressor and condenser, and the air circulating means includes a propeller type fan for circulating the room air vertically over said evaporator, and a pump driven by said room air fan for discharging condensate to the outside air.

11. An air conditioning unit comprising, in combination, a base, means forming three parallel vertical compartments extending upwardly from said base, a refrigerating system having operatively connected compressor, condenser and evaporator elements disposed respectively in said compartments, air circulating means communicating with said condenser and evaporator compartments for circulating outside air and room air respectively therethrough, means whereby outside air flows in opposite directions over said compressor and condenser, and the air circulating means includes a propeller type fan for circulating the room air vertically over said evaporator, and a pump driven by said room air fan for discharging condensate to the outside air, said base having a recessed portion forming a sump into which condensate accumulates from said evaporator.

12. An air conditioning unit comprising, in combination, a base, means forming three parallel vertical compartments extending upwardly from said base, a refrigerating system having operatively connected compressor, condenser and evaporator elements disposed respectively in said compartments, air circulating means communieating with said condenser and evaporator compartments for circulating outside air and room air respectively therethrough, means whereby outside air flows in opposite directions over said compressor and condenser, and the air circulating means includes a propeller type fan for circulating the room air vertically over said evaporator, a pump driven by said room air fan for discharging condensate to the outside air, and fan oscillating mechanism for driving said pump.

13. The combination set forth in claim 6 further characterized in the provision of means whereby air from said outside air circulating means is supplied to the ejector at a point near said sump.

14. A self-contained air conditioning unit for installation in a room adjacent a window or other suitable wall opening comprising, in combination, a compressor and motor therefor disposed at one end of the unit, an evaporator disposed at the other end of the unit, means for circulating room air over said evaporator, a condenser, and means for circulating outside air over said condenser including a blower located at an intermediate portion of said unit near the bottom thereof, and walls forming passages for infiowing and outfiowing outside air, said passages having vertically extending adjacent portions located between said compressor and evaporator and communieating respectively with the inlet and outlet of said blower, and said unit having a pair of lateral openings in its back side near the top thereof for allowing communication between the vertical portions of said passages and the outside air through the window or wall opening,

15. A self-contained room cooler unit for installation in a room adjacent a window or other suitable wall opening comprising, in combination, an evaporator, means for circulating room air thereover, a condenser, means forming an air passage therefor having one portion extending vertically from the lower portion ot the unit and terminating in a lateral opening in the back side oi' the unit, a blower disposed at the lower portion of said vertical passage. a motor disposed laterally of said passage for driving said blower, a compressor supported over the top of said motor, and means including said blower and said passage forming means for causing the air to ow in one direction over said compressor and in the opposite direction over said condenser.

ARTHUR S. LOCKE. 

